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F-26642-8 © Copyright 2010 Schneider Electric All Rights Reserved. 9
Mounting Caution: To remain in NEMA 2/IP54 compliance, the MA4X-715X and MA4X-707X series
actuators should be mounted with conduit end down.
Mount the TAC DuraDrive Actuator directly on the damper shaft in locations that clear the
maximum dimensions of the actuator case and allow the actuator to be mounted flush to the
surface of the terminal box and perpendicular to the damper shaft.
Note: Some terminal boxes have sheet metal screw heads or other protrusions near the
damper shaft. In these cases, a spacer or shim may be added under the anti-rotation
bracket of the actuator to make the actuator perpendicular to the shaft.
Damper Actuator Sizing
Correct sizing of the actuator is necessary for proper control of dampers. The area of
damper that can be controlled by a given actuator is dependent upon the type of damper,
the quality of the damper, the pressure drop across the damper in the closed position, and
the velocity of the air flow through the damper. To obtain actual damper torque requirements,
contact the damper manufacturer.
Damper Shaft Sizing
Use the “Long Damper Shaft” mounting instructions if the damper shaft is at least 3-1/2"
(90 mm) long.
Use the “Short Damper Shaft” mounting instructions if the damper shaft is shorter than 3-1/2"
(90 mm) or the area around the damper shaft is too narrow to allow standard mounting, as
described in the “Short Damper Shaft” mounting section.
MA40-704X Series Installation
Note: The MA40-704X series actuator comes equipped with standard universal mounting
clamp. For damper shafts larger than 5/8" (16 mm) in diameter, the AM-710 universal
mounting clamp is required (order separately). The AM-710 clamp accommodates shafts
sizes up to 3/4" (19 mm) diameter shafts.
Shaft Rotates
Clockwise
To Open
Shaft Rotates
Counterclockwise
To Open
A - Left
A - Right
This step determines
shaft rotation. Linkage
may change damper direction.
Long Shaft
Short Shaft
Min. 3 1/2" (90 mm)
3/8" to 3/4" Diameter (10 mm to 20 mm)
3/8" to 1/2" Square (10 mm to 13 mm)
Min. 3/4" (20 mm)
Move the damper to its normal position. Verify the controller action is set to match the
damper application.
Normally closed damper: when damper is closed, actuator position indicator should
be at 0°. When damper is open, actuator position indicator should be at 90°.
Normally opened damper: when damper is open, actuator position indicator should
be at 0°. When damper is closed, actuator position indicator should be at 90°.